using System;

public class Program

{

    public static void Main()

    {

        int result = 0;

        for (int i = 1; i < 1000; i++) {

         if (((i % 3) == 0) || ((i % 5) == 0)) {

               result += i;

    }

}   

        Console.WriteLine("The sum of all the multiples of 3 or 5 below 1000 is "+result);

    }

}